CN108678483B - Integral constraint type buckling-restrained brace with replaceable core - Google Patents
Integral constraint type buckling-restrained brace with replaceable core Download PDFInfo
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- CN108678483B CN108678483B CN201810499490.2A CN201810499490A CN108678483B CN 108678483 B CN108678483 B CN 108678483B CN 201810499490 A CN201810499490 A CN 201810499490A CN 108678483 B CN108678483 B CN 108678483B
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- core
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- inner core
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- buckling
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
Abstract
An integral constraint type buckling-restrained brace with a replaceable core belongs to the field of structural engineering. The buckling-restrained brace consists of two core members, a peripheral constraint member, a core outer side connecting cover plate and a high-strength bolt group. Based on the core sectional assembly type design concept, the core member is pressed tightly in a sectional mode to transmit axial pressure, the core outside connecting cover plate and the high-strength bolt group transmit axial tension, the dog bone weakening or the grooving weakening is arranged on the core member to control the plastic development area of the core member, so that the buckling restrained brace meets basic bearing and energy consumption, the two core members can be pulled out of the peripheral restraining member only by disassembling the high-strength bolt group and the core outside connecting cover plate after earthquake, the buckling restrained brace with the core member replaced can still be used continuously, the requirement of function recovery after earthquake is met, the service life is prolonged, economic benefits are improved, and the defect that the core member cannot be replaced after the traditional integrally restrained buckling restrained brace is damaged is overcome.
Description
Technical Field
The patent relates to an integrally-constrained buckling-restrained brace with a replaceable core, and belongs to the technical field of structural engineering.
Background
The buckling-restrained brace consists of an inner core component and a peripheral restraining component, wherein the inner core component bears axial pressure, and the peripheral system restrains the transverse displacement of the inner core component so that the inner core component can generate full-section yielding under the action of axial pressure. Since the 90 s ' earthquake of Osaka and North Ridge in America in the past century, a great deal of engineering practice has been carried out in developed countries such as America and Japan, and the buckling restrained brace becomes one of the best energy dissipation and shock absorption members due to the combination of the ' support function in normal use state and small earthquake ' and the ' energy dissipation function under large earthquake ' and is rapidly popularized and applied in recent years.
At present, most of anti-buckling supports commonly adopted in engineering are integrally restrained components, a core component is generally in a shape like a Chinese character ' yi ', a shape like a Chinese character ' ten ' or an I ', a peripheral restrained component is a concrete peripheral restrained component, a steel pipe concrete peripheral restrained component or an all-steel peripheral restrained component, a certain gap is reserved between the surface of the core component and the surface of the peripheral restrained component, and the core component is prevented from being blocked due to transverse expansion when being pressed. Under the normal use state and the action of small shock, the inner core component of the buckling-restrained brace is stressed to keep an elastic state and provides enough rigidity for the main body framework; when a large earthquake occurs, the inner core component firstly goes into yielding, a large amount of earthquake energy is consumed, and the main body frame is protected.
However, the whole restraint type buckling restrained brace of using always now, even take place local damage and also can only whole change after the earthquake takes place, cause building material's serious waste, be not conform to the connotation of advocating green building now. Based on the above, the invention provides an integrally-constrained buckling-restrained brace with a replaceable core, which overcomes the defect that the traditional integrally-constrained buckling-restrained brace cannot replace a core component after being damaged, and is characterized in that axial pressure is transmitted by jacking two core components, axial tension is transmitted by connecting a cover plate and a high-strength bolt group outside the core, a dog bone weakening or slotting weakening is arranged on the core components to control the plastic development area of the core components, and a peripheral constraining component still plays a role in preventing buckling instability of the two core components; after the earthquake, the two core members can be taken out of the peripheral restraint member only by disassembling the high-strength bolt group and the core outer side connecting cover plate, the buckling-restrained brace with the replaced core members can still be continuously used, the requirement for function recovery after the earthquake is met, the service life of the brace is prolonged, and the economic benefit is improved.
In addition, the high-strength bolt group used for connection has a force transmission function and a limiting function, when the inner core member is pulled, the high-strength bolt group transmits the pulling force on the inner core member to the outer side of the inner core to connect the cover plate, and simultaneously, the high-strength bolt group limits the peripheral restraining member to slide, and the peripheral restraining member does not participate in stress. When the inner core members are pressed, the high-strength bolt group limits the peripheral restraining members to slide, the peripheral restraining members are in a bending state, and the two inner core members are restrained from buckling and buckling instability.
The invention can realize the replacement of the core component of the integrally restrained type buckling restrained brace after the earthquake by adopting the common plates through reasonable arrangement, and does not need to additionally arrange a limiting device of a peripheral restraining component; the invention has simple integral structure and reasonable force transmission, is particularly suitable for buildings in areas with higher seismic fortification intensity, ensures the bearing and energy consumption of the structural side force resisting component, solves the problems of quick repair after earthquake and the like, avoids the waste of building materials and has good social benefit and economic benefit.
Disclosure of Invention
The invention provides an integrally-constrained buckling-restrained brace with a replaceable core, and aims to overcome the defect that the core component of the existing integrally-constrained buckling-restrained brace cannot be replaced after an earthquake occurs, avoid building material waste, prolong the service life of the brace, improve economic benefits and provide more selection ranges for the integrally-constrained buckling-restrained brace.
In order to achieve the purpose, the invention adopts the following technical means:
the utility model provides a but about the type buckling restrained brace of removable kernel which characterized in that: the buckling-restrained brace consists of two core components, a peripheral constraint component, a core outer side connecting cover plate and a high-strength bolt group; the buckling-restrained brace overcomes the defect that the traditional integrally-restrained buckling-restrained brace cannot replace the inner core component after being damaged, based on the core sectional assembly type design concept, axial pressure is transmitted through the jacking of the two inner core components, axial tension is transmitted through the connecting cover plate outside the inner core and the high-strength bolt group, the plastic development area of the inner core component is controlled through dog bone weakening or slotting weakening arranged on the inner core component, and the peripheral restraining component still achieves the purpose of preventing buckling instability of the two inner core components; after the earthquake, the two core components can be extracted from the peripheral constraint component only by disassembling the high-strength bolt group and the core outer side connecting cover plate, and the buckling-restrained brace with the replaced core components can still be continuously used, so that the function recovery requirement after the earthquake is met; a 1-2mm gap is left between the peripheral constraint component and the surface of the inner core component, or rubber is filled; the two inner core members need to penetrate through the peripheral constraint member during installation and the end parts of the two inner core members are tightly propped, and then the inner core members and the peripheral constraint member are connected into a whole through the outer side connecting cover plate of the inner core and the high-strength bolt group.
The whole length of the inner core component is divided into three areas: an end reinforcing area for avoiding the bending damage of the end of the core component of the anti-bending support; the middle weakening area, namely the plastic development area of the inner core member, is controlled in a dog bone weakening or grooving weakening mode, the weakening width is more than twice of the diameter of the hole of the high-strength bolt, the weakening area is filled with rubber materials or is not filled with the rubber materials, the tensile bearing capacity of the section of the area is ensured to be weaker than that of the other two areas, and therefore the plastic damage is controlled in the area; and the end part is provided with an opening connecting area which is used for connecting the cover plate and the peripheral restraining component on the outer side of the inner core, transmitting axial tension through the high-strength bolt group and limiting the sliding of the peripheral restraining component.
The outer side connecting cover plate of the inner core and the peripheral constraint component are provided with holes at the corresponding positions of the hole connecting areas at the end parts of the inner core component; the connecting cover plate at the outer side of the inner core, the peripheral constraint component and the two inner core components are connected into a whole by installing the high-strength bolt group.
The yield strength of the plate of the core outer side connecting cover plate is higher than that of the core member, and the total tensile bearing capacity of all the core outer side connecting cover plates is higher than twice of the tensile bearing capacity of the section of the weakening area in the middle of the core member; the high-strength bolt group has a force transmission function and a limiting function, when the inner core member is pulled, the high-strength bolt group transmits the pulling force on the inner core member to the connecting cover plate on the outer side of the inner core, and simultaneously limits the peripheral restraining member to slide, and the peripheral restraining member does not participate in stress; when the inner core members are pressed, the high-strength bolt group limits the peripheral restraining members to slide, the peripheral restraining members are in a bending state, and the two inner core members are restrained from buckling and buckling instability.
The inner core component is a linear component, a cross component or an I-shaped component; the peripheral constraint component is a concrete peripheral constraint component, a steel pipe concrete peripheral constraint component or an all-steel peripheral constraint component.
The advantages of the patent are shown in the following aspects:
(1) the core member may be replaced after the earthquake. Based on the core sectional assembly type design concept, the buckling-restrained brace is used for tightly pushing and transmitting axial pressure through two core components, transmitting axial tension through the core outer side connecting cover plate and the high-strength bolt group, and controlling the core component plasticity development area by arranging dog bone weakening or slotting weakening on the core components, so that the buckling-restrained brace meets basic bearing and energy consumption, and can be pulled out from the peripheral restraining component by only disassembling the high-strength bolt group and the core outer side connecting cover plate after an earthquake, the buckling-restrained brace with the replaced core components can still be continuously used, the requirement of function recovery after the earthquake is met, the service life is prolonged, the waste of building materials is avoided, and the economic benefit is improved. In addition, the core sectional assembly type concept is applied to the integrally restrained type buckling restrained brace, so that the core component can be replaced after the earthquake, and the method is initiated in the field.
(2) The force transmission is reasonable and the stress is ingenious. When the inner core member is pulled, the high-strength bolt group transmits the pulling force on the inner core member to the connecting cover plate on the outer side of the inner core member, and simultaneously, the peripheral restraining member is limited from sliding, and at the moment, the peripheral restraining member does not participate in stress. When the inner core members are pressed, the high-strength bolt group limits the peripheral restraining members to slide, the peripheral restraining members are in a bending state, and the two inner core members are restrained from buckling and buckling instability.
(3) Simple structure and multiple purposes. The invention has simple structure, all components can be prefabricated in a factory and assembled in the factory or construction site, the processing precision is high, and no complex construction process is generated. The high-strength bolt group used for connecting each component in the device plays a role in force transmission and limiting, and a limiting device of a peripheral restraining component is not required to be additionally arranged.
Drawings
FIG. 1 is a three-dimensional view of an integrally restrained buckling restrained brace having a replaceable core;
FIG. 2 is a disassembled view of an integrally restrained buckling restrained brace with replaceable core;
FIG. 3 is an elevation view of an overall restraint type buckling restrained brace with a replaceable core;
FIG. 4 is a side view of an alternative inner core, integrally restrained buckling restrained brace;
FIG. 5 is a top view of an integrally restrained buckling restrained brace having a replaceable core;
FIG. 6 is a schematic view of a core component section of an integrally constrained buckling restrained brace having a replaceable core;
FIG. 7 is a schematic illustration of a core member weakening type for an integrally restrained buckling restrained brace with a replaceable core: (a) is in dog bone weakened form and is not filled; (b) in the dog bone weakened form, and rubber filled; (c) in a slotted weakened form;
figure 8 shows several types of alternative inner core elements and peripheral constraining elements: (a) the concrete periphery constraint type buckling-restrained brace is a concrete periphery constraint type buckling-restrained brace with a replaceable linear inner core; (b) the concrete periphery constraint type buckling-restrained brace with the replaceable cross-shaped core is adopted; (c) the concrete periphery constraint type buckling-restrained brace with the replaceable I-shaped core is adopted; (d) the steel pipe concrete periphery constraint type buckling restrained brace is a steel pipe concrete periphery constraint type buckling restrained brace with a replaceable linear inner core; (e) the four-steel-pipe concrete periphery constraint type buckling-restrained brace with the replaceable cross-shaped core is adopted; (f) the double-steel-pipe concrete periphery constraint type buckling-restrained brace with the replaceable linear kernel; (g) the buckling restrained brace is an all-steel peripheral restrained brace with a replaceable linear kernel; (h) the all-steel periphery constraint type buckling-restrained brace with the replaceable cross-shaped core is adopted; (i) the buckling restrained brace is an all-steel peripheral restrained brace with a replaceable I-shaped core.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to fig. 1 to 8.
As shown in fig. 1 to 8, an integrally restrained buckling restrained brace with replaceable core comprises the following components:
1-a core member;
2-a peripheral restraining member;
3, connecting a cover plate at the outer side of the inner core;
4-high strength bolt group;
5-end reinforcement zone;
6-middle weakening zone;
7-end opening connection zone;
8-dog bone weakening;
9-grooving weakening;
10-filling with rubber material;
11- "one" style of calligraphy kernel component;
12- "ten" shaped inner core component;
13- "I" shaped inner core component;
14-concrete peripheral restraining type member;
15-steel pipe concrete periphery constraint type component;
16-all-steel peripheral restraint type member.
As shown in fig. 1-8, the integral constraint type buckling restrained brace with the replaceable core comprises two core members (1), a peripheral constraint member (2), a cover plate (3) connected to the outer side of the core, and a high-strength bolt group (4). During installation, the two core components (1) penetrate into the peripheral restraining component (2) from two sides respectively, the two end parts are tightly pressed, the high-strength bolt group (4) penetrates through the outer side of the core to be connected with the cover plate (3) and the peripheral restraining component (2) in sequence, and then the components are connected into a whole by applying pretightening force to form the buckling-restrained brace.
The core member (1) is divided into three regions, as shown in fig. 6, an end reinforcing region (5), a middle weakening region (6), and an end opening connecting region (7), respectively. The end reinforcing area (5) can be reinforced by a conventional method by additionally arranging a rib plate; the middle weakened area (6) is controlled in a dog bone weakening (8) or grooving weakening (9) mode, the weakening width is larger than twice of the diameter of the hole of the high-strength bolt, the weakened area is filled with a rubber material (10) or is not filled with the rubber material, the tensile bearing capacity of the section of the area is guaranteed to be weaker than that of the other two areas, the middle weakened area (6) is arranged in the dog bone weakening (8) mode, and the weakened area is not filled; and the end part is provided with a hole connecting area (7) for connecting the core outer side connecting cover plate (3) and the peripheral constraint component (2) so as to ensure the force transmission and limiting functions of the high-strength bolt group (4).
During assembly, the two core components (1) penetrate into the peripheral restraining component (2) from two sides respectively, two end parts of the two core components are tightly pressed, the high-strength bolt group (4) penetrates through the outer side of the core to connect the cover plate (3), the peripheral restraining component (2) and the core components (1), and then the components are connected into a whole by applying pretightening force to form the buckling restrained brace. The inner core component (1) can use a straight-line-shaped component (11), a cross-shaped component (12) or an I-shaped component (13), and the peripheral constraint component (2) can use a concrete peripheral constraint component (14), a steel pipe concrete peripheral constraint component (15) or an all-steel peripheral constraint component (16). The specific form of the combination of the inner core member (1) and the peripheral constraining member (2) is shown in detail in fig. 8, and a user can select the combination according to the structural design requirement. In the example, a linear inner core component (11) and an all-steel periphery constraint component (16) are selected. In addition, the present invention is not limited to the examples, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (2)
1. The utility model provides a but about the type buckling restrained brace of removable kernel which characterized in that: the buckling-restrained brace consists of two core components, a peripheral constraint component, a core outer side connecting cover plate and a high-strength bolt group; the buckling-restrained brace is based on a core sectional assembly type design concept, axial pressure is transmitted through the jacking of two core components, and axial tension is transmitted through a connecting cover plate and a high-strength bolt group on the outer side of a core; after the earthquake, the two core components can be extracted from the peripheral constraint component only by disassembling the high-strength bolt group and the core outer side connecting cover plate, and the buckling-restrained brace with the replaced core components can still be continuously used, so that the function recovery requirement after the earthquake is met; the whole length of the inner core component is divided into three areas: the three areas are respectively an end strengthening area (5), a middle weakening area (6) and an end opening connecting area (7); an end reinforcing area for avoiding the bending damage of the end of the core component of the anti-bending support; the middle weakening area, namely the plastic development area of the inner core member, is controlled in a dog bone weakening or grooving weakening mode, the weakening width is more than twice of the diameter of the hole of the high-strength bolt, the weakening area is filled with rubber materials or is not filled with the rubber materials, the tensile bearing capacity of the section of the area is ensured to be weaker than that of the other two areas, and therefore the plastic damage is controlled in the area; the end part is provided with a hole connecting area which is used for connecting the cover plate and the peripheral constraint component on the outer side of the inner core, effectively transmitting axial tension through the high-strength bolt group and limiting the sliding of the peripheral constraint component; a 1-2mm gap is left between the peripheral constraint component and the surface of the inner core component, or rubber is filled; the two inner core members need to penetrate through the peripheral constraint members during installation and the end parts of the two inner core members are tightly propped, and then the inner core members and the peripheral constraint members are connected into a whole through the outer side connecting cover plate of the inner core and the high-strength bolt group; the outer side connecting cover plate of the inner core and the peripheral constraint component are provided with holes at the corresponding positions of the hole connecting areas at the end parts of the inner core component; connecting the connecting cover plate at the outer side of the inner core, the peripheral constraint component and the two inner core components into a whole by installing a high-strength bolt group; the outer side of the core is connected with the cover plate at the outer side of the peripheral restraint device, the yield strength of the plate material of the outer side of the core is higher than that of the core component, and the total tensile bearing capacity of all the outer side of the core is higher than twice of that of the section of the weakening area in the middle of the core component; the high-strength bolt group has a force transmission function and a limiting function, when the inner core member is pulled, the high-strength bolt group transmits the pulling force on the inner core member to the connecting cover plate on the outer side of the inner core, and simultaneously limits the peripheral restraining member to slide, and the peripheral restraining member does not participate in stress; when the inner core members are pressed, the high-strength bolt group limits the peripheral restraining members to slide, the peripheral restraining members are in a bending state, and buckling instability of the two inner core members is effectively restrained.
2. The replaceable core integrally constrained buckling restrained brace of claim 1, wherein: the inner core component is a linear component, a cross component or an I-shaped component; the peripheral constraint component is a concrete peripheral constraint component, a steel pipe concrete peripheral constraint component or an all-steel peripheral constraint component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499490.2A CN108678483B (en) | 2018-05-23 | 2018-05-23 | Integral constraint type buckling-restrained brace with replaceable core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810499490.2A CN108678483B (en) | 2018-05-23 | 2018-05-23 | Integral constraint type buckling-restrained brace with replaceable core |
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| CN108678483A CN108678483A (en) | 2018-10-19 |
| CN108678483B true CN108678483B (en) | 2020-08-07 |
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| CN201810499490.2A Active CN108678483B (en) | 2018-05-23 | 2018-05-23 | Integral constraint type buckling-restrained brace with replaceable core |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110924553B (en) * | 2019-12-10 | 2021-11-12 | 东北林业大学 | Assembled buckling restrained brace |
| CN113175256A (en) * | 2021-04-13 | 2021-07-27 | 同济大学 | Midpoint bolt reinforced laminated wood buckling restrained brace |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004092052A (en) * | 2002-08-29 | 2004-03-25 | Shimizu Corp | Brace damper |
| CN102493570B (en) * | 2011-12-19 | 2013-09-11 | 苗启松 | Multi-stage series anti-buckling support and manufacturing method |
| JP5944424B2 (en) * | 2014-03-11 | 2016-07-05 | 大和ハウス工業株式会社 | Joint structure of buckling-restrained brace |
| JP6466075B2 (en) * | 2014-03-19 | 2019-02-06 | 大和ハウス工業株式会社 | Joint structure of split buckling restraint brace |
| CN206309097U (en) * | 2016-12-15 | 2017-07-07 | 广州华森建筑与工程设计顾问有限公司 | The replaceable assembled buckling restrained brace of section is surrendered after one kind shake |
| CN106639029A (en) * | 2017-02-04 | 2017-05-10 | 同济大学 | All-steel-assembled buckling restrained brace with lateral side capable of being inspected |
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